a(n) = 11*n*(n+1).

Terms

a(0) =0a(1) =22a(2) =66a(3) =132a(4) =220a(5) =330a(6) =462a(7) =616a(8) =792a(9) =990a(10) =1210a(11) =1452a(12) =1716a(13) =2002a(14) =2310a(15) =2640a(16) =2992a(17) =3366a(18) =3762a(19) =4180a(20) =4620a(21) =5082a(22) =5566a(23) =6072a(24) =6600a(25) =7150a(26) =7722a(27) =8316a(28) =8932a(29) =9570